oh, the same thing happened with me when I first got my soprano sax. My dad bought me one by Antigua Winds for my birthday last year, and the lower notes (below D) came out an octave above. This could have to do with your air stream. If you're going from say a tenor to a soprano, you're obviously not going to need as much air... Also, you could have a leak. Mine had a couple leaks, which caused the lower notes to go up an octave. Also, you should play your soprano like a saxophone, and not a clarinet.... holding it straight down is more "clarinetish" .. try holding it out more as you would a trumpet or something. See if that works. When I first got mine, I was advised to use a tuner while playing, to make sure your pitch is right. You might want to do that as well - it helped me. Good luck! Kara